Mechanical movement for nut-making or other machinery.



' no. 707,202. i u Patented Aug. 19,1902;

o; c. BunmcT-L s. c. cANnEE. MECHANICAL -MDVEMENT FOB .NUT MAKING 0B OTHER MACHINERY.

Y (Applicatin led Nov. 11 1900.)

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oRRIN o. BURDICT AND BERTRAM; ANDEE, or BUFFALQANEW YORK;

SAID ACANDEE ASSIGNOR'TO SAID BURDIT.

, MECHANICAL .MOVEMENT FOR NUT-MAKING ORJOTHERMACHINERY.

SPECIFICATION forming part of Letters iatent N o. 707,202, dated August 19, 1902. A Application filed November l, 1900. Serial No. 35,110. (No model.)

Be it known nthat we, ORRIN AC. BURDIGT' and BERTRAMC."CA NDEE, citizens of the United States, residing at vBualmin the county of Erie and State of New.y Yorkhave invented new anduseful Improvements in Mechanical Movements for Nut-Making or` other Machines, of which the following is' a specification.

This invention. relates toa mechanical,

movement forconvertingy rotary motion into intermittent motion. This'ichangeof motionv has heretoforeusually been obtained bythe use of a cam; butjthis is undesirable in 1nachinery which is subjected vto great strains,

such asnut-making.machines,because the4 cam usually bearsonly at one place against a roller or other part, which receives the thrust' the parts to wear longerand at the same time j causing the actuated part'tostand still' for aV considerable time.

' In the accompanying drawings, Figure l is a side elevationrof a nut-making machine embodying our invention. Fig. 2 is a top plan view of the same, partly in section. Fig. 3

is a fragmentary side-elevation ofthe mech-Y ani'sm containing our invention and showing the same in a 4dierent position from Fig. l. Fig. 4 is a reversal of themechanism in Figs.

1, 2, and 3. .Fig'fshowsa modification of our invention.v

Like letters of reference refer to like parts in the several figures The nut-'making Ymachine shown in Figs. l to 3 ofthe drawings and containing our improved mechanical movement consists, essentially, of a main frameA, a shaft B, journaled transversely on the mainframe and providedwith a pulley or balance-wheel 19,'a forming -die C, av longitudinal reciprocatingv cutter or punch D, which is arranged in front of the die and cuts the nut-blank from a bar c and pushes the same into the forming-die, a slide D', carrying the cutter and connected `bye, ritme@ withearankd Oh'haft a reciprocating crowning-punch E,'which is arranged in the rear part of the die land has a concave front end, whereby the` convex crown is formed on the nut Vand which also ejects the'nut from the die, vand a horizontally-reciprocatingslide E', which carriesl the crown- `ing-punch and which the main frame. l a, In theoperationzofthe machine theend of the bar from which the nuts aremadejis moved in front ofthe opening in the ldie., 'The cutter then movesy forwardly and cuts off the nut-blankfrom the-end ofthe bar and pushes the same into .the-die. VDuring the forward movement,ofthercutterA the crowning-punch is arranged in therear end ofy thedie and is isguidediniways e e on at'rest, sothatt'hefnut ispressed` against the,

same by the cutter and avconvex crown is `formed on the top ofthenut. Thecutter is lnow retracted rearwardly and then ,the crowning-punch moves forwardly.v and ejects the -nut from the die and then moves backward to its position of rest preparatory to receiving the next nut-blank. l y

The mechanismjwhereby `the. crowningpunch is moved. intermittently forward and backward for ejecting the nut andis then permitted toremain at restduringthe crowning operation is constructed as follows.:`

F F represent twoj eccentrics arranged on opposite. endsof the ,main shaftpand pro-A strapsff.

G G represent two pairs of connecting-rods which4 are arranged vlengthwise on opposite sides of the frame `andwhich connecttheieccentrics with the crowning-punch slide. The rods of each pair are secured at their. front ends to the upper and lower part ofthe strap of one of the eccentrics, while the rear ends of the rods pass loosely through horizontal openings g g, formed o ne aboveg thejother in a swivel-head g. The' latter is pivoted on a lwrist g2 on the corresponding end of the slide vided with the usual surrounding .eccentricwhicharriesthe crowning-punch. E ach of theconnecting-rods is providedinfrorit and in rear'of the swivel-head with shifting shoulders H H. Each of the front shoulders H consists, preferably, of asplit collar, which is adjustably secured tothe rod bya screw 71 which connects the split parts of the collar. The rear shoulders II consist of screw-nuts which engage with screw-threads on the rods.

I represents springs which surround the connecting-rods between the front side of the swivel-head and the front collar II, Figs. l to 3.

.I J represent stops or abutments whereby the backward movement of the crowningpunch slide is arrested and which are arranged in rear of the ends of the slide. Each of these stops preferably consists of an abutment-plate 7', which is guided on a thrust-lug 7c, arranged on the main frame, a screw-bolt 7c connecting the abutment-plate with said lug, washers k2, arranged between the abutment-plate and the thrust-lug, and washers 7c3, arranged between the head of the screwbolt k and the thrust-lug. In order to permit the crowning-punch to stand still while the cutter-punch is pressing the nut against the same, the abutments are adjusted so as to arrest the backward movement of the crowning-punch before the eccentrics complete their rearward stroke. D uring the first part of the rearward stroke of the eccentrics the swivel-heads of the crowning-punch slide are held by the springs I against the rear shoulders I'I', which causes this slide at this time to move in unison with the eccentrics. Before the eccentrics reach the end of their rearward stroke the crowning-punch slide engages the abutments and is arrested against further backward movement with the eccentrics. While the latter complete their backward movement independent of the crowningpunch slide the connecting-rods Gr move rearwardly through the swivel-heads, whereby the springs I are compressed until the eccentrics reach the rear end of their backward stroke. During the first part of the subsequent forward stroke of the eccentrics the connecting-rods move idly forward through the swivel-heads, while the latter remain at rest until the rear shoulders I'I of the rods engage the rear side of the swivel-heads, and thereafter the crowning-punch slide is compelled to move forward with the eccentrics to the end of the forward stroke thereof. By this means a forward-and-backward reciproeating motion is imparted to the crowningpunch for ejecting the formed nut, and then the punch is permitted to rest during the crowning operation, although the eccentrics which actuate the crowning-punch are rotating continuously. It will thus be seen that by connecting an actuating-eccentric with the part to be actuated in this manner the advantage of a large bearing-surface provided by the eccentric is fully utilized, thereby reducing the wear upon the machine to a minimum.

By adjusting the abutment-plates on the main frame and shifting the shoulders H II on the rods the movement of the working position of the crowning-punch may be varied as desired. The shoulders I-I H can be shifted on the connecting-rod after loosening the tomos same, and the abutment-plates may be adjusted by loosening the screw-bolts 7c and varying the number of washers 7a2 7a3 between the thrust-lugs, the abutment-plates, andthe screw-bolts 7s until the parts are in the required position.

Although we have shown our mechanical movement applied to a nut-making machine, the same is applicable to various purposes in which a rest is required in a reciprocating or oscillating part and in which the motion is derived from a rotating eccentric. For some purposes the rest of the part which is actuated must` take place during the forward stroke of the eccentric, in which case the location of the spring I is reversed and arranged between the rear side of the swivelhead and the rear shoulder, and an abutment j is arranged in front of the slide or actuated part, as shown in Fig. 4E. When it is necessary to produce a rest in the actuated part L in the middle of the stroke of the eccentric, two abutments J J are arranged on opposite sides of the actuated part L and springs I I are arranged between opposite sides of the actuated part and the shoulders II II on the connecting-rods, as shown in Fig. 5.

We claim as our inventionl. The combination of a slide, actuating mechanism for said slide including a lost-motion connection, a stop for arresting said slide before said actuating mechanism therefor reaches the end of its stroke, a second slide, parts carried by said slides and arranged one in advance of the other in a plane parallel to the direction of movement of said slides, and means for reciprocating said second slide, whereby the part carried thereby approaches the part carried by said first slide while the latter is at rest, substantially as set forth.

2. The combination of two slides arranged one in advance of the other in substantially the same plane, actuating mechanism for one of said slides including a lost-motion connection, a stop for arresting said slide before said actuating mechanism therefor reaches the end of its stroke, and means for reciprocating said second slide whereby the same approaches the first-mentioned slide while the latter is at rest, substantially as set forth.

3. The combination of two slides mounted to reciprocate in substantially the same plane and arranged one in advance of the other, actuating mechanism for the front slide including a lost-motion connection, a stop for arresting said first slide before said actuating mechanism therefor reaches the end of its stroke, and means for reciprocating said rear slide whereby the same approaches the front slide while the latter is at rest, substantially as set forth.

LI. The combination of a slide, a rotary shaft, operating connections between said slide and said rotary shaft including a lost-motion devicea second slide, operative connections between said second slide and said shaft, parts carried by said slides and arranged one IOO IIC

in advance ofthe other in a plane parallel to the direction of movement of the slides, and' a stop forarresting said rst-mentioned slide before said second-mentioned slide reaches the end of its stroke, substantially as set forth.

5. The combination With a slide, of rotary eccentrics, pitmen connected tosaideccentries and loosely connected toi said slide,

shoulders on said pitmen,' springs interposed between said shoulders and said slide at one side, shoulders on said pitmen at the other side of said slide, and a' stop adapted to ar' rest the movement of y'said slidebefo're said eccentrics reach the 'end of'thei'r stroke, substantially as set forth.

Witness our hands this 6th day 0f October2 l. ORRIN C. BURDICT.

t BERTRAM C. CANDEE.

Witnesses:

THEO. L. Porr, E. A. VOLK. 

